(19)

(11)

EP 2 107 929 A2

(12)

(88) Date of publication A3: 31.12.2008 (43) Date of publication: 14.10.2009 Bulletin 2009/42 (21) Application number: 07853157.1 (22) Date of filing: 27.11.2007

(51) International Patent Classification (IPC):  B01D 39/16(2006.01) (86) International application number: PCT/US2007/024449 (87) International publication number: WO 2008/066813 (05.06.2008 Gazette 2008/23)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR (30) Priority: 27.11.2006 US 861178 P (71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY Wilmington, DE 19898 (US)	(72) Inventors: LIM, Hyun Sung Midlothian, Virginia 23113 (US) CHI, Cheng-hang Midlothian, Virginia 23113 (US) (74) Representative: Matthews, Derek Peter  Frank B. Dehn & Co. St Bride's House 10 Salisbury Square London EC4Y 8JD London EC4Y 8JD (GB)